package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.core.toolkit.BeanUtils;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexPatterns;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    /**
     * 发送短信验证码并保存验证码
     * @param phone
     * @param session
     * @return
     */
    public Result sendcode(String phone, HttpSession session) {
        //1校验手机号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2不符合返回错误信息,true代表不符合
            return Result.fail("手机号码格式错误");
        }

        //3符合，生成验证码
        String code = RandomUtil.randomNumbers(6);

        /*//4保存验证码到session
        session.setAttribute("code",code);*/

        //4保存验证码到 redis set key value ex 120
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone,code, CACHE_NULL_TTL, TimeUnit.MINUTES);

        //5发送验证码
        log.debug("发送短信验证码成功，验证码为：{}",code);
        // log.info("发送短信验证码成功，验证码为：{}",code);
        return Result.ok();
    }

    /**
     * 登录功能
     * @param loginForm 登录参数，包含手机号、验证码；或者手机号、密码
     */
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        // 1.校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {

            // 2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！");
        }
        //3.从redis校验验证码
        String cachCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+ phone);
        String code = loginForm.getCode();
        if(cachCode == null || !cachCode.equals(code)){
            //不一致报错
            return Result.fail("验证码错误");
        }
        //4.一致，根据手机号查询用户
        User user = query().eq("phone", phone).one();

        //5.判断用户是否存在
        if (user == null) {
            //6.不存在，则创建
            user = creatUserWithPhone(phone);
        }
        // 7.保存用户信息到redis
        // 7.1 随机生成token作为登录令牌
        String token = UUID.randomUUID().toString(true);
        // 7.2将User对象转为Hash存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor
                                ((fieldName,fieldValue)->fieldValue.toString()));
        // 7.3存储
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY + token,userMap);
        //设置有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,CACHE_SHOP_TTL,TimeUnit.MINUTES);
        // 8 返回token
        return Result.ok(token);
    }


    //签到统计
    @Override
    public Result signCount() {
        return null;
    }


    //签到
    @Override
    public Result sign() {
        // 1.获取当前登录用户
        Long userId = UserHolder.getUser().getId();
        // 2.获取日期
        LocalDateTime now = LocalDateTime.now();
        // 3.拼接key
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY + userId + keySuffix;
        // 4.获取今天是本月的第几天
        int dayOfMonth = now.getDayOfMonth();
        // 5.写入Redis SETBIT key offset 1
        stringRedisTemplate.opsForValue().setBit(key, dayOfMonth - 1, true);
        return Result.ok();
    }

    /**
     * 创建新用户
     * @param phone
     * @return
     */
    private User creatUserWithPhone(String phone){

        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
